I know the author of this plugin is looking into this issue since I have posted this at the official forum, but I thought I would also post this here as well in case this site gets more visitors who have any ideas or have found ways to fix the issue!
I have upgraded to ALO Easymail 2.4.17 and I cannot send the test email, I get the red "X". In addition, when I send the newsletter to the recipients, it says it was successful, however not a single person gets the newsletter! All other email from site sends correctly.
I'm using wordpress v 3.5.1. The version of NextGEN gallery I'm running is the current one (1.9.12). I have also went back to the old version of NextGEN (1.9.11) and get the same problem.
I tried to do the debug option in the settings of ALO, but the log file never seems to be created.
Please let me know what else might be helpful to you and I can get the information.
Thanks a lot guys!